april 1953

april 1953: 44 companies

1. april 1953 26 companies

5. april 1953 1 companies

6. april 1953 1 companies

8. april 1953 1 companies

10. april 1953 3 companies

12. april 1953 1 companies

13. april 1953 1 companies

14. april 1953 1 companies

15. april 1953 1 companies

18. april 1953 1 companies

20. april 1953 1 companies

22. april 1953 2 companies

23. april 1953 1 companies

27. april 1953 1 companies

28. april 1953 1 companies

30. april 1953 1 companies